Question

help with quadratic inequalities

Answer 1

Yep.

Answer 2

yay!

Answer 3

[-9,-1]
because x can take the values -9 and -1

Answer 4

oh ya i remember

Answer 5

( is for <>

Answer 6

yes,
( .... ) means x cannot take the extreme values
(-9,-1) is -9<x<-1
here, we get -9<=x<=-1
so, [-9,-1]